Error on 1.5.8

An exception occurred: BRTPC_thread_profile_cover.css - Line 135: Invalid condition expression in /home/****/****/***/***/XenForo/Template/Compiler.php on line 991
XenForo_Template_Compiler->getNewCompilerException() in XenForo/Template/Compiler.php at line 1215
XenForo_Template_Compiler->_parseConditionExpression() in XenForo/Template/Compiler.php at line 1066
XenForo_Template_Compiler->parseConditionExpression() in XenForo/Template/Compiler/Tag/If.php at line 109
XenForo_Template_Compiler_Tag_If->compile() in XenForo/Template/Compiler.php at line 641
XenForo_Template_Compiler->compileTag() in XenForo/Template/Compiler.php at line 570
XenForo_Template_Compiler->compileSegment() in XenForo/Template/Compiler.php at line 509
XenForo_Template_Compiler->compileSegments() in XenForo/Template/Compiler.php at line 372
XenForo_Template_Compiler->compileParsed() in XenForo/Model/Template.php at line 1601
XenForo_Model_Template->compileAndInsertParsedTemplate() in XenForo/Model/Template.php at line 1379
XenForo_Model_Template->compileTemplateInStyleTree() in XenForo/Model/Template.php at line 1329
XenForo_Model_Template->compileNamedTemplateInStyleTree() in XenForo/Model/Template.php at line 1268
XenForo_Model_Template->compileAllTemplates() in XenForo/Deferred/Template.php at line 36
XenForo_Deferred_Template->execute() in XenForo/Deferred/Atomic.php at line 66
XenForo_Deferred_Atomic->execute() in XenForo/Model/Deferred.php at line 295
XenForo_Model_Deferred->runDeferred() in XenForo/Model/Deferred.php at line 429
XenForo_Model_Deferred->_runInternal() in XenForo/Model/Deferred.php at line 374
XenForo_Model_Deferred->run() in XenForo/ViewRenderer/Abstract.php at line 352
XenForo_ViewRenderer_Abstract::hasManualDeferredToRun() in XenForo/ViewRenderer/HtmlAdmin.php at line 131
XenForo_ViewRenderer_HtmlAdmin->renderContainer() in XenForo/FrontController.php at line 639
XenForo_FrontController->renderView() in XenForo/FrontController.php at line 158
XenForo_FrontController->run() in /***/***/***/***/admin.php at line 13